Concrete-form clamp



J. J. FRONSOE ET Ai;

\ CONCRETE FORM CLAMP July 15 1924. 1,501,212

QL wW/ W' Jose 11d- Frunsme .3. v nfin/Rnaalski Patented July 15, 1924.

UNITED; STATES PATENT .Fmef

JOSEPH J. rnoNsoE AND Joint noeats'xr, or MILWAUKEE, WISCONSIN.

consensus-roan amine.-

Application filed De cember 13. 1923. Serial No. 680,444.

' do hereby declare-that thevfollowing is a full, clear, and exact description thereof.

This invention relates to concrete form clamps. Y

In reinforcing and securing concrete forms such as those employed'in making pillars, posts and similar articles, it has been customary to either nail the parts tov gether'orto bind them with wire prior to pouring the concrete. These .niet-hods are defective on the one hand in that the nails frequently pull loose and split the form if wood forms are used, and that they have to be subsequently withdrawn to open the form when the concrete has set, and on the other hand the slipping of the twisted wire or breaking thereof, frequently results in a wholly unsatisfactory job. Further than this, it is difficult to remove these wires as they are under very great tension on account of expansion due to the weight of the concrete.

This invention is designed to overcome the above noted defects, and objects of such invention are to provide a concrete form clamp which may be quickly and accurately adjusted to the correct shape of the form, which may be easily clamped in position to exert the requisite pressure upon the form to prevent any give or expansion thereof, which is so constructed that a rough adjustment'may be effected at one portion thereof and an accurate, fine adjustment at another portion so that the exact adjustment may be very quickly attained, and to provide a clamp which may be most readily removed after the concrete has set.

Further objects are to provide a concrete form clamp which may be very cheaply manufactured from standard stock, which is rugged in construction, and which is not to furnish the necessary clamping pressure for the form. I V An embodiment of the invention is shown inthel accoinpanying drawing, in which Figure 1 is a view of theclampin its-as sembled position.

' lligure 2 is a sectional view on the line 2-2 of Figure 1.

Figure 3 is a sectional view: on the line 3--3 of Figure 2. r

The device comprises a rod' which is bent intermediate its ends so as to provide a pair of members 1 and 2 at right angles toeach other. The terminal-portions of the members 1 and'2 are threaded as shown in Figure 1. Uponthese threaded portions eyef letted portions 3 and 4 of straps 5'and 6 are slidably positioned. These eyeletted portions may be conveniently formed by,

bending the ends of the wrought iron or other "strapiron as indicated in Figure 2.

The strap 6 is turned intermediate its ends so as to provide a vertical portion 7 through which a plurality of rectangular slots 8 are cut. The strap 5 is adapted to be projected through any one of these slots 8 to secure the desired rough adjustment in one direction of the clamp. It is also provided with a plurality of holes 9 in any one of which a tapered pin 10 may be placed,the pin in its adjusted position being adapted to receive the outward push or thrust from the portion 7 of the strap 6, as clearly shown in Figure 2. If desired, the pin may be secured to the portion 7 of the strap 6 by means of a chain 11. In order to maintain the correct alignment of the side of the concrete form adjacent the strap 6, a block 12 is slidably positioned upon the vertical portions 7, as clearly shown in thedrawings- The inner face of thisb-lock is in alignment with the inner face of the horizontal portion of the strap 6, as may be seen from Figure 1. A convenient way of forming the block 12 is to make it of strap iron and bend its outer ends 13 inwardly towards each other so as to slidably grip the portion of this strap as shown in Figure 3. Nuts 14 and 15 are screwed upon the threaded portions of the straps 1 and 2, respectively, and bear against the eyeletted portions 4 and 3 of the straps.

In using the device the pin 10 is removed and the strap 5 slid from the corresponding aperture 8. The device is then positioned about the concrete form and the straps are again related by sliding the strap 5 through the appropriate aperture 8 to secure the desired rough adjustment in one direction of the device. The rough adjustment in the other direction is secured by sliding the strap 7 along the strap 5 and placing the pin 10 in the appropriate aperture 9. There after, any desired finer adjustment may be secured by manipulating the nuts 14: and 15. In addition to this, the exact tension needed is secured by tightening the nuts.

Although the invention has been .described in considerable detail, it is to be understood that the invention may be variously embodied and is, therefore, to be limited only as claimed.

rod having arms extending at right angles to each other and provided with threaded terminal portions, a'strap for each rod extending at right angles therefrom and having eyeletted portions slidably carried by said rods, nuts threaded upon said terminal port-ions and bearing against said eyeletted portions, the outer ends of said straps being arranged in crossing relation, and means for holding said outer ends in any one of several relatively adjusted positions.

3. A concrete form clamp comprising a pair of members having arms extending at right angles toeach other and provided with threaded terminal portions, a pair of straps having their ends folded over to form eyelets such eyelets being slidably mounted upon said terminal portions, nuts screwed upon said terminal portions and bearing against said eyelets, one of said straps having slots therein for the reception of the other strap, such last mentioned strap having a plurality of apertures therethrough, and a pin adapted to be positioned in any one of said apertures to removably hold the outer ends of said straps in any one of several relatively adjusted positions.

In testimony that we claim the foregoing we have hereunto set our hands at Milwaukee, in the county of Milwaukee and State of Wisconsin.

JOSEPH J. FRoNsoE. JOHN ROGALSKI. 

